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Dr. Carl Sagan

One of the books written by Dr. Carl Sagan was a best seller for seventy
weeks!

Dr. Carl Sagan was a very famous astronomer. Many people around the world
knew him because he wrote books and was often on television. The
movie "Contact" was based on a book written by Dr. Sagan and his
wife. Dr. Sagan's television series "Cosmos" was seen by more
than 500 million people. Carl Sagan was born in New York on November 9,
1934. When he was a boy, he loved to read science fiction books. He was
also very curious about astronomy. His parents taught him to search for the
answers to his many questions about science. As an adult, Dr. Sagan
continued to look for answers to questions about science. He was among the
first to think that life could have existed on Mars. He believed scientists
from Earth should study the possibility of life in other parts of the
universe. Dr. Sagan helped design the Mariner 2 mission to Venus and
the Mariner 9 and Viking trips to Mars. He also worked on the
Voyager mission to
the outer solar system and the Galileo mission to Jupiter.
Dr. Sagan suffered
from a rare bone marrow disease. The disease
was responsible for Dr. Sagan's death on December 20, 1996.